The English flora - SeaweedAfrica

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368 ALGJE CONFERVOIDE^:. [Caluthrix.
sulphureous qualities, as if the hepatic gas were necessary to its production
and nourishment." Dillw.
** Velutinse: forming a continuous velvetty stratum on the
surface of rochs.
6. C. scopulorum, Ag. (simple Bock Calothrix); filaments
minute erect curved flexuose simple subattenuate dirty-green
agglutinated at the base forming a continuous velvetty stratum.
—Ag. Syst.Alg.p. 70.— Conferva scopulorum, Dillw. Conf.l.A.
E. Bot. t. 2171.
On marine rocks, near high-water mark, common; spreading in darkgreen
slippery patches.—The filaments are a line in height, flexuose,
slichtly attenuated to a subacute point, simple, slimy at the base, and
under the microscope of a dull yellowish-green; strise indistinct.
7. C. fasciculdfa, Ag. (branched Bock Calothrix) ; filaments
erect very straight dark-green subulate with a setaceous point
fasciculately pseu do-branched, forming a continuous velvetty
stratum. Ag. Syst. Alg.p. 71.
Marine rocks, below high-water mark. Miltown Malbay, JF. H. Harvey.
— Stratum very dark, shining green. Filaments 2— 3 lines high, tufted,
erect, straight, attenuated to a long setaceous point. They are sometimes
simple, but more generally furnished with 2—6 erect, closepressed
pseudo-branches ; the striae are strongly marked, and very closely
set. The filaments, in my specimens, are longer, straighter, more accumulated,
and of a darker colour than 1 find them in an authentic specimen
from Agardh.
8. C. rufesce?is, Carm. (reddish Calothrix);~ filaments'" very
minute reddish spreading in a very thin slimy purplish stratum.
On rocks, under the spray of cascades: Appin, Capt. Carmichael.—
" Crust or stratum of indefinite extent, and so thin as to seem a
mere discolouration of the rocks, until the finger is passed over it, when
a certain slimyness detects the presence of the plant. Filaments half a
line in length, and so slender as to appear mere lines under the highest
power of the compound microscope," Carm. MSS.
*** Csespitosse : forming large tufts, filaments pseudo-branched.
9. C. interrupta, Carm. (variegated Calothrix) ; filaments
thick subulate coriaceous glaucous-green short, cohering in
tooth-like fascicles and forming broad tufts.
On mosses and Lichens. Appin, Capt. Carmichael. Turk Cascade,
Killarney and Tobermorey in the Isle of Mull, W. H. Harvey.— " Filaments
about a line in length, of a glaucous-green colour, united into close,
erect tufts, spreading over the moss, thick, tnpering, cohering at the base,
and sometimes through their whole length. Internal mass here and
there interrupted, leaving short pellucid spaces, resembling articulations.
SlricE close and conspicuous." Carm. MSS. cum icone.— The texture is
decidedly coriaceous and the filaments so strongly agglutinated together
in tooth-like fascicles, that it is with great difficulty they can be separated
on the table of the microscope.
10. C hydnoides, Harv. (Uydnum -like Calothrix); filaments
elongated flexuose cylindrical obtuse interwoven at the base, the